Release mechanism for photographic shutters.



-A. WOLLENSAK. RELEASE MECHANISM EUR PHoToGRAPHlc SHUTTERSI APPLICATION FILED AUG.9. 1916.

1,235,273. Patented July 31, 1917.

@jfl-0 ANDREW WOLLENSAK, OF ROCHESTER, 'NEW YOEK; ASSIGNOR T0 WOLLENSAK OPTICAL COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION..

RELEASE MECHANISM FORA PHOTOGRAPHIC SHUTTERS.

Original application led March 9,1916, Serial No. 83,1801` Divided and this application led 1916. Serial No. 113,911.

To all 'whom it may concern.'

Be it known that I, ANDREW VoLLE'NsAK, a citizen of the Uni-ted States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Release Mechanisms for-Photographic Shutters, of which the following is a specification.

This invention relates to release mechanisms for photographic shutters, and this application is a division of an application filed by me on March1 9, 1916,4 Serial No. 83,180 on a photographic shutter. An object of theA present invention is to provide a guide for the end of a release wire such as is commonly used in photographic shutters, and to so construct the guide that. it shall be simple, cheap and effective. p

To/.these and other ends, the invention consists 1n certain parts and combinations of parts all of which will be hereinafter described, the novel features beingl pointed out in the appended claims.

In the drawings:

Figure 1 is a partial front View of a releas@J mechanism embodying the present invention;

Fig. 2 is a section lon the .line a-a, of Fig. 1; A

Fig. 3 is an enlarged portion of Fig. 1, in section; and U llFig. 4 is a perspective view of the guide tu e.

The release mechanism maybe applied to various types of shutters, although, in the present case, the shutter is illustrated as simi- -lar to that shown in the above mentioned application.

VThe shutter is represented as having a shell, blades 2, and a master member 3 that is adapted to operate^ said blades through Isuitable mechanism, not shown. The master member is set up or moved to operating position by an actuating lever 4, which, in turn, may be moved by a thumb piece 5. The actuating lever 4 has an extension 6 that is adapted to be engaged by the concave head 7 on a release wire gr cable 8 of ordinary construction, .this wireoeing sheathed in the usual (fiexible casing 9 and provided at its outer end with a finger button 10. A spring 11 returns the head 7 to the position shown when the button 10 is released.

Specification of Letters Patent.

Patented July 31, i917.

August 9,

To permit the wire 8 to be used for the purpose of moving. the actuating lever 4 without-becoming disengaged therefrom a guide for the head 7 is provided. In the present case, this guide comprises a cylindrical tube 12, having a laterally-extending lug or bracket 13 in which is a threaded hole 14.v The tube 12 extends through and closely ts an opening 15 in the shell l of the shutter, while the lug 13 lies against the inner rim and is held inl place'by a stud 16. The actuating` lever 4 extends through a slot 17 in the side of the tube opposite the lug 13,-and theterminal 18 of the sheath 9 is threaded into the outer end of the tube 12 at 19.

By reason of the tube 12 extending through the opening 15, the single stud 16 is the only fastening required to hold the tube in place, so that the labor of assembling rthese parts is greatly minimized. The tube l2 is of suiicient length to guide the head 7 through the entire length of travel of the actuating lever 4, so that the head is always `held in engagement with the end 6 of said lever and will not slip out of connection with the master lever. By this construction, the attaching tube for the release wire also serves as a guide for the end of the release wire to prevent disconnection between said release wire and the actuating lever for the shutter operating mechanism.

What I'claim as my invention and desire to secure by Letters Patent is:

1. In combination in a photographic shutter having a casing, a release wire and an actuating lever for the shutter operating mechanism, an attaching tube for the release wire projecting through the outer wall of the shutter casing and extending into the casing, the extended portion within the casing having a recess'therein through which the actuating lever operates so that the extended portion will serve as a guide for the release wire to 'prevent disconnection between the latter and the actuating lever.

' 2. In combination in a photographic shutteran attaching tube, a release wire having a sheath engaging with the outer end of said tube and a head operating beyond the inner end of the sheath, said head being guided throughout its entire operating movements by said tube, and an actuating lever for the shutter operating mechanism, engaged by 'said head. l

3. p A1 release mechanism for photographic shutters comprising a release Wire, a head on said'vvire, anda tubular guide for said head having a lateral lug adapted to be fastened to the shutter easing by a single'stud.

e. in combination with a shutter casing having a perforation, a release mechanism comprising a tubular guide extending through the perforation in the shutter casing and having a lateral lug secured to said casing to one side of the perforation, and also having a slot to receive an actuating member of the shutter., and a release Wire eXv-y 15 said guide having a lateral lug on one side and a slot on the other side, and being @e cured to the shutter casing by said lug, and a release Wire having a head adapted to move within the guide and to engage an ac- 25 tuating member of the shutter.

i ANDREW -vvennnnsaie 

